H2
Soleus Air
High Temperature Protection / Overheat (Heat Mode)
Display shows H2; unit may stop heating (on heat-capable models) or limit operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Blocked air filter or outlet, Overheated internal components, Faulty high-temperature sensor
How to Fix / Troubleshooting
Safety: Turn off and unplug the unit before cleaning or inspection.
- Clean filters and vents: Remove and wash the air filters. Ensure the air outlet and inlet grilles are not blocked by curtains, furniture, or dust buildup.
- Check installation: Confirm that the unit has adequate clearance around it for airflow as specified in the Soleus Air manual.
- Inspect sensors: Locate the high-temperature sensor near the heater or condenser section (on heat pump models). Ensure it is properly mounted and wiring is intact.
- Allow cool-down: Let the unit cool for 30 minutes, then restart. If H2 recurs quickly, a sensor or control issue may be present.
- Replace sensor or board: If the high-temp sensor tests open/shorted, replace it. If sensor is good, the main PCB may be misreading and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
High Temperature Sensor
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